77290045 has 16 divisors (see below), whose sum is σ = 107343360. Its totient is φ = 52326144.

The previous prime is 77290039. The next prime is 77290091. The reversal of 77290045 is 54009277.

77290045 = 1336² + 1337² + ... + 1377².

It is a cyclic number.

It is not a de Polignac number, because 77290045 - 2¹¹ = 77287997 is a prime.

It is a super-2 number, since 2×77290045² = 11947502112204050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11212 + ... + 16741.

It is an arithmetic number, because the mean of its divisors is an integer number (6708960).

Almost surely, 2^77290045 is an apocalyptic number.

It is an amenable number.

77290045 is a deficient number, since it is larger than the sum of its proper divisors (30053315).

77290045 is a wasteful number, since it uses less digits than its factorization.

77290045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28044.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 77290045 is about 8791.4757009276. The cubic root of 77290045 is about 425.9655923043.

The spelling of 77290045 in words is "seventy-seven million, two hundred ninety thousand, forty-five".